Re: st: Countfit and Exposure

[Richard Williams <Richard.A.Williams.5@ND.edu>]

At 08:36 AM 8/1/2007, Franklin, Frank wrote:
> Hello Fellow Listeners,
>
> I have a question regarding the use of the command countfit...how does
> the command manage "exposure", is this built in the command or must one
> add it manually as you would when running a count model outside of the
> countfit command.  If so, what is the best way to do this for the
> command?
>
> I have tried many different approaches and I can not seem to get
> countfit to replicate the same outcomes as when I compare the PMR, NBRM,
> ZIP and ZINB separately.
I don't know the answer to your Q.  But, -countfit- is part of Long & 
Freese's spost9 routines.  If you don't already have it, I highly 
recommend their book, which can be found at

http://www.stata.com/bookstore/regmodcdvs.html


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Richard Williams, Notre Dame Dept of Sociology
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